Species account from Moths of Glamorgan
(Gilmore, Slade & Stewart, 2009):

These records are for moths that have been reported in Glamorgan as being either Acleris laterana or comariana but not determined to species (either by the late instar larvae or by dissection). The flight period can be a rough guideline, as A. laterana usually flies in August and September and A. comariana flies in June and July and again from October to November. However there is a rather large overlap between these sets of dates making positive identification from flight period unreliable.